If listening to the LIO is like having a seat in the studio mix room, then the LIO with AVC/Tubestage is being in the room with the musicians. Tighter bass, wider/taller/deeper imaging, and more overall presence - there is simply more "there" there without adding anything unnatural or colored.
I honestly didn't think the AVC would make this big of a difference. I am genuinely (and pleasantly) surprised to hear further detail revealed while maintaining the musicality I have come to love from my LIO.
Well done Vinnie, well done. 
Tim
Hi Tim,
Thank you! And thank you for posting feedback on your LIO AVC/Tubestage module.

I've said it before and I'll say it again - the LIO with AVC/Tubestage makes for an
amazingly good sounding, off-the-grid, tube preamplifier with one of the best volume controls (if not THE best) available today! It's hard to match this kind sonic performance for the price - and when you follow that with LIO MOSFET AMP (or an external VR120 power amp), it is hard not to become totally addicted to it!

I'm glad you are hooked!
Improvement compared to what?
Hi Plink,
Compared to his LIO RVC and LIO Tubstage modules that his new LIO AVC/TUBESTAGE module replaced.
How does the AVC/Tube compare to AVC only?
I posted about this, here:
http://www.audiocircle.com/index.php?topic=135549.msg1440877#msg1440877Regarding yardbird4's comments, his LIO has the LIO MOSFET AMP module installed as well (integrated amp
w/ dac and phonostage). So fully integrated and isolated ultracapacitor powered... like we've been using at the
shows this year.

Vinnie